Safety window air adjuster



Patented Feb. 28, 1933 UNITED STATES JOSEPH c. CHALUPA, on BIEIWVYN;y ILLINoIsl Y sArnTY WINDOW AIR ADJUs'rEn Application led February 8, 1932. Serial No. 591,723. ,ni

This invention relates to a holding device for window sashes, and whereby one or both of the sashes may be partly arranged for the ventilation of a room and wherein the con- 5 struction is such as to prevent the further opening of Veither of the sashes and the entrance to the room by unauthorized persons. A further obj ect is the provision of a means :tor this purpose which can vbe easily and 1 quickly attached to the sliding sashes o f .or-

ldinary windows, to permit of the free sliding of the sashes or for locking or latching either of the sashes to hold the said sash in a partly open position for the ventilation of the room.

To the attainment of the foregoing the invention consists in the improvement hereinafter described and definitely claimed.

In the drawing:

Figure 1 is a horizontal sectional view through two sliding sashes equipped with the improvement.

Figure 2 is a vertical sectional view approXimately on the line 2 2 of Figure 1.

Figure 3 is a substantially similar sectional view but showing the double acting bolt held in a position to permit the free sliding of the sashes.

Figure 4 is a detail sectional view on the line 4-4 of Figure 2.

Figure 5 is a detail sectional view on the line 5-5 of Figure 3.

In the drawing the numeral 1 designates a portion of a window casing, between whose beads there are arranged for slidable movement the sashes 2 and 3, respectively. The

flanged or beveled lapping edges at the meeting ends of the rails of therespective sashes 2 and 3, adjacent to the parting bead that spaces the said sashes is cut-away to accommodate a rack plate 4 which is fixed on the inner face of the vertical .stile of the upper sash 2. The rack may be of any desired length and in fact comprises a lat plate which, at equidistantly spaced intervals, has its outer face thickened by curving the same and the said thickened portions arevcentrally formed with notches 5.

Preferably on the meeting rail of the lower sash 3 and directly opposite what I have termed the rack plate 4 there is fixed a cas- Vrail a rod or leverllhavingan outer crank ing 6 whose outer faceis partly open,'and in'this casing there is pivoted, as at T-,the central portion of a double ended ,dog 8. The pivot passes through a roundedboss 9 formed 'onthe inner faceof the dog,and 55 there is let in the said .upper sash a ytube 10 that communicates with the .casing and there is passed. through an-opening? inl-.the said end l2.v Thefinnerfend of the swing'ablerod or lever 11 is slotted and has' receiveoltherel-4 in andfpivoted thereto, "asat 113, the arm. or shank 14 of a cam plate 15.Y The cam 15 is Oif-` set from its'shank and has an. Outer widened and llat end which is centrally Aformedwith a round depression-16 to receive therein the boss 9 of the dog-when the lever is turned to one position and hold both of the active v ends 17 of the said dog in Vneutral position, that is, to hold the dog out ofvengagement with the notches 5 in the plate/4. In the'tu'be or sleeve 10 there is a .Coil .preSSure'Sprng18, that contacts with a'washer 19 on thelever 11', the said springforcing the washer 19 against the pivot bolt 13 vfor the cam.V

ANormally the lever is in the position disclosed by Figure Bof thedrawing, and the sashes 2 and 3 are free to slide in the window casing. When the lever isturned by gripping the crank end 12 thereof to bring the camytothe positionfdisclosed by Figure 2 of the drawing the said cam will contact with the lever beyond jone side ofthe pivot `7, thus swinging the lever s othat .oneI of the active ends 17 thereof will bev brought intoone of the notches 5. Thisv is accomplished when the upper sash is .lowered and permitsthe upper sash being moved to its closed position but prevents its downward movement. When the upper sash is ,lowered to .admit air into the room the lever is turned to bring the dog 15 to engage with the inner face of the dog at lthe opposite side of the pivot, which 'will bring the lower active end 17 of the lever into one of the notches 5. This prevents the lowering of the lower sash. Thus the dog when either of its active ends are in engagement with the notches 5, holds either of the respective sashes but-permits the said sashes moving in unison. The notched plate ori-199' rack 4 is only of a length suicient to admit a desired quantity of air into a room, and it is thought the simplicity of my construction and its advantages will be readily apparent 5 to those skilled in the art when the foregoing has been read in connection with the accompanying drawing so that further detailed description will not be required.

kHaving described the invention, I claim:

1. A means for latching upper and lower sashes in a window frame for the admission of fresh air into a room, comprising a rack plate fixed on onel ofthe sashes, a .double ended dog carried by the second sash having a central boss and a pivot passing Vthrough said boss, a lever passing through said sash and having an outer angle end and spring means influencing theV lever in one direction, stop means for limiting. suchmovement of y the lever and a cam member secured to and Y' offset from the inner. end of the lever and havingits outer face notched to normally freceive they boss of the double ended dog l therein land likewise toy Contact with the inner face of the, Vdog at points equidistant from the opposite sides of the pivot for .swinging eitllier end of said dogfto engage with the 2. A meansfor holding the sliding sashes of a window casing ypartlvraised or lowered for the admission of air therethrough, comprising a, plate Xed to the vertical stile of the/upper sash and having spaced enlargements whichv are notched, acasing fixed in the inner faceM of the meeting stile of the lower 4sash and having an Iopen face, a double ended dog having a central rounded boss on itslinner end and a pivot carriedY by the casing for said boss, a tubular member letin 40 said rail fromv the inner face thereof, a lever slidable through the rail and entering the casing and having' an outer cranked end, a cam member having an offset shank received e in and secured to the'lever, said cam having its outer face widened and formed with a rounded depression to receive the boss of the dog therein when the lever is in one position to permit of thel free sliding of the sash and said cam likewise designed when the lever Vis '50 brought'to otherpositions to Contact and to swing the dog to cause either selected end Y thereof to bevreceived inl the notches'of the v plate and spring means influencing'the leverinthe direction of the dog., In testimony whereof I affix my signature.

` JOSEPH QCHALUPA. 

